2.0 mm or less) and grains are generally seriate in texture. Other textures, such as the presence of amphibole veins could be an indication of metasomatism at some point. Chemical analysis of mineral compositions reveals olivine, orthopyroxene, and clinopyroxene similarities between various sites throughout the Canadian Cordillera. Spinel, however, varies not only between Craven Lake samples, but also between different volcanic centers. The presence of am phi bole, not seen at other volcanic centers, makes the Craven Lake site unique and may have important implications for the formation of nephelinite magmas. Two-pyroxene temperature estimates for the xenolith suite also reveal a wider range of values than other sites (898-1231 °C). The data presented in this study, when compared to other xenolith studies in the Canadian Cordillera, vary enough from previously reported textural, chemical, and mineralogical data to speculate that the lithospheric mantle beneath Craven Lake is not homogeneous with the rest of the Canadian Cordillera upper mantle.